Method of making containers



Aug. 9, 1927.

E. F. HULBERT v METHOD OF MAKING CONTAINERS Filed 00;. 2:5, 1925 INVENTOR. {M F liv ATTORNEYS Patented Aug. 9, 1927.

v UNITED STATES EDWIN F. HULBERT, 0F MILWAUKEE, WISCONSIN, ASSIGNOR, BY MESNE ASS IGN- I MENTS, TO THE MASTER PACKAGE CORPORATION OF DELAWARE.

METHOD or MAKING; CONTAINERS.

Application filed October 23, 1925. Serial No. 64,474.

The invention relates to a method of making containers.

Containers usually have their siding made up of a number of wrappings of fibre or paper sheets wound into cylindrical or conical tubing. The object of this invention is to simplify the manufacture of containers by forming the siding from a flat sheetof fibre or paper which is blanked out, indented, and pressed so that when folded along the indentations it will form the siding, and which may also be treated so as to receive and retain the bottom closure within it to form the finished container body.

The invention further consists 1n the method hereinafter set forth and more particularly defined by claims at the conclusion hereof.

In the drawings, Fig. 1 1s a plan VIC-W of the finished blank forming the siding of the container;

Fig. 2 is an end elevation view of this blank;

Fig. 3 is a perspective V ew of the container in partially assembled condition;

Fig. 4 is a detail sectional view showing.

the joint between the ends of the s ding when secured together to form the finlshed siding.

A fibre blank 5, initially fiat, of either pressed pulp or a number of sheets of fibre or paper, commonly known as fibre board, and preferably one in which the fibres are loosely matted, is cut from a fiat sheet to form the desired tubing which, in the case of a conical siding, has its edges 6 and 7 formed by concentric circles and 1ts ends 8 and 9 cut along radii passing through the common center of the circular edges 6 and 7 and in the case of a cylinder is rectangular.

This blank 5, wh1ch is treated with an alkali, is'subjected to a pressing operation between heated tools to form the finished blank shown in Figs. Land 2. By this pressing operationa recess 10 isformed on one side of the end 8 and a recess 11 on the opposite side of the end 9 so that when, later, these ends are brought together and secured by adhesive, or 111 any other suitable manner, they Wlll form a lap oint 12, as shown in Fig. 4. I I

By this pressing operation there is also formed'a head-receiving recess or channel tend along radii passing through the C0111- mon center of the circular or arcuate edges 6 and 7, and simultaneously,therewith the sections of the blank between these indentations are pressed into cylindrical segments,

in the case of a cylinder, and frustro-conoidal'segments 16. as shown in Fig. 2, in the case of conical siding whose curved surfaces are designated by the numeral 17.

Not only does this pressing operation cause the blank to assume the form shown in Fig. 2, but it also solidifies or compacts the fibres of the blank sothat when finished the sections 16 are tough and hard.

The finished blank is then formed around a circular or disk head 17 which fits within the annular groove formed by the channel 14 and the recessed ends are oined to form the finished container body. Fig. 3 shows the container being fitted about the head and just before the ends are secured together to formthe finished body.

What I claim asmy invention is: .1. The method of forming the tubular siding of a container which consists in pressing a. flat fibre sheet blank to'form a series of spaced indentations on its inner side and solidified segmental curved portions between said indentations. bending the finished blank along said indentations t'o tubular form and joining the end portions together.

2. The method of forming, a container having tubular siding which consists in pressing a flat fibre sheet'blank into a finished blank having a. head-receiving recess, oppositely disposed tongues at. the ends. spaced indentations and solidified segmental curved portions, bending saidfinished blank along said indentations about the head so as to secure the same Within said recess, and securing the end tongues together in lapped relation. I

3. The method of forming a'pail body which consists in cutting afiat fibre sheet into a blank having concentric arcuate sides, pressing said blank to -solidify it and forin recessed end edges, a series of Spaced indentations on its inner side and frustro-conoidally curved sections between said indentations, the recess of one end being disposed opposite to that of the other and engageable pressed blank secured thereto to form a and bending the finished along said indentations into conical form and securing said ends together.

4. The method of forming a pail body which consists in cutting a flat fibre sheet into a blank having concentric arcuate sides, pressing said blank to solidify it to form recessed end edges and a channel extending parallel to and adjacent one of said sides, and a series of frustro-conoidally curved sections with indentations on the inner side between said sections, bending this finished blank about the head so as to receive the edge of therewith and lapped joint,

the head within the channel, and lapping said recessed end edges together and securing them in lapped position ished pail body.

5. The method of forming a container which consists in hot pressing a flat fibre sheet blank into a series: of segmental secto form the fintions and bendable portions between the sections whereby the finished blank may be bent into tubular form,-bending the finished blank to tubular form, and securing the ends together to form the finished tubing.

1 In testimony whereof, I afiix my signature.

EDWIN F. HULBERT. 

